姉×姉！どっちが好き？どっちも！！～優しいお姉ちゃんとクールなお姉ちゃんに挟まれて僕はもうっ！！～

One of the older sisters as mother one of the older sisters as father, protagonist was raised gently and severely. Is the efficacy of two efforts said, protagonist grows up to the child that the family trowing is good. However, because he made too much effort, protagonist had become a child who liked older sisters more than just a family for a moment!